Check-valve with stop.



No. 65I,793 V Patented lime l2, I900. J. J., J. W. 8:. J. E. BROWN.

CHECK VALVE WITH STOP.

(Application filed. .nm. 24, 4900. (No Model.)

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'NITED STATE {PATENT OFFICE.

JOHN J. BROWN, JOHN W. BROWN, AND JAMES E. BROWN, OF WEST COVINGTON, KENTUCKY, ASSIGNORS OF ONE-FOURTH TO WILLIAM A. LANG, OF SAME PLACE.

CHECK-VALVE WITH STOP.

SPECIFICATiON formingpart of Letters Patent No. 651,793, dated June 12, 1900.

' Apphcation filed January 24, 1900. Serial n... 2,565. (Nb 1.1.61.1.) V

1%) all whom it mayconcern:

Be it known that.we,'JoHN J. BROWN, JOHN W. BROWN, and JAMES E. BROWN, citizens of the United States, and residents of West Oovington, Kenton county, State ofKentucky, have invented certain new and useful Improvements in the Construction of Check- Valves with Stops; and we do declare that the following is a description thereof sufficiently clear, full, and exactto enable others skilled in the art to which it appertains to make and use the same, attention being called to the accompanying drawings, with the reference-numerals marked thereon,which form a part of this specification.

This invention relates to improvements in fittings used to control passage through pipes and conduits and operating substantially so as to permit such passage in one direction only, but preventing return of the matter after it has passed. Check-valves operating against water or steam pressure belong to this class of devices, and in order to illustrate our invention we have described and illustrated the same in connection with a steam-boiler. In

such connection check-valves are generally found interposed between the boiler and an injector, where such is used to supply water to the former, and their particular functionconsists of holding the pressure in the boiler at all times, but particularly at the time when the injector is not operating." Devices of this kindthat is, check-valves-also injectors and their intermediate pipe connections are subject to considerable wear and tear, and particularly in movable boilerslike such of locomotives and marine boilers, they are constantly exposed to and liable to accidents, injuries, and other circumstances which interfere with their proper operation or prevent such altogether. The objectionable consequences of an inoperative check-valve or one unable to come to its seat, thereby possibly permitting escape of the steam froma boiler, for instance, require no further mention.

In view of these exigencies auxiliary but independent means have been provided, so arranged and constructed as to operate in a manner which permits additional and positive control of the same passage otherwise automatically controlled by the check-valve, so that whenever this latter is inoperative or out of order said means may take the place thereof. These auxiliary means consist, substantially, of a positive key or stop combined with the check-valve and being capable of taking the place of this latter serve temporarily, whenever such becomes necessary, to

close the passage controlled thereby, so that thereafter access may be had to the checkvalve for purposes of inspection, repair, and renewal of any of the parts affected.

Our invention consists of certain details of construction as described and pointed out in the annexed specification and the claims following it, and as illustrated in the accompanying drawings, in which- Figure 1 shows in a central vertical section a check-valve combined with a positive stop, both in a positionwhich'permits clear passage and provided with our improvements. Fig. 2 in a similar View shows the parts open to permit inspection and access to the check valve, the passage controlled by the latter being meanwhile closed against the pressure to permit such. Fig.' 3 in a view also similar shows the passage" controlled by the checkvalve closed and parts of the device disconnected to permit inspection, repair, or re placement of such. parts. Fig. 4 is a top View of the device, and Fig. 5 is a central horizontal section thereof.

In the drawings, 7 indicates a check-valve of customary construction, having on its under side the usual guide-wings 8 to hold it straight and resting when closed against a seat 9. Any fluid, like steam or water, may freely pass from passage 11 into the valvechamber and out thereof through a passage 12, but flowin opposite direction is prevented, since the valve will immediately seat itself by reason of the pressure of the returning fluid. In the case under consideration, 11 may represent a pipe connected with an injector, and 12 may be the nipple by which the device is attached to a steam-boiler. Water when needed is driven by the injector through pipe 11 into the valve-chamber and from there a etij'ze the valve for thepurpose of ascertaining the t nature'of the trouble and to enable the removal of the same by rearrangement, repair, or, if necessary, by replacement of the affected part. To permit such access, positive stops to be manually operated are usually provided, which in a case like the pres ent one would be interposed on the pressure side of the check-valverthat is, between it and the boiler-which stop when closed holds the pressure in the latter and, dispensing"- meanwhile with the need of the check-valve,

permits access to it. For such a stop the walls'which form casing 13, constituting the valve-.chamberof the check-valve, are generally used, the same being rotatably seated and fitted into an outer housing 14. This casing is provided with a port 15, so located that rotation of the former maycause this port to register with the outlet from the housing and, as shown in Fig. 1, permit free communica-' tion with nipple 12, or it may close this-outlet altogether, as shown in the other figures, 1 thereby preventing return of pressure. For

so manipulating this casing a part of it projectingabove housing 14 is shaped to form a nut 16, permitting application of a wrench. Wheneverstop 13 is closed, ready access may be had to the check-valve without suffering any loss of pressure or steam nor without be ing inconvenienced by escape of the latter through nipple 12. This access is from above and is had by simply unscrewing a plug 17,

seated in the open upper end of the casing and having depending from its under side the customary stop 18, which limits the liftof the check-valve. After this plug is removed the parts appear as shown in Fig. 2, access to the valve'being had from above. (See, also Fig- 5-) This procedure may be resorted to when inspection merely becomes necessaryor for purposes of loosening only the valve when it sticks or to simply remove any obstruction from under it which prevents its coming to a seat, the whole manipulation requiring only a few moments.

For more extensive repairs or for renewal of any of the parts they are separated, as illustrated in Fig. 3. To facilitate such separation, access to, as well as independent renewal of any damaged parts without requiring renewalof any others not involved, we provide also for the'possibility of access from below,

for which purpose we interpose thereat a removable memberin shapeof a ferrulejor joint 19, screwed from below into the valve-housing'andserving also as a means to mediate the connection between this latter and pipe.

We also use theupper part of this ferruleas the-seat 9 for the valve, as shown inFig. .1, thereby obviating the renewal of this latter holes when the plug is screwed home.

incase :the seat is only damaged. This connection of pipe 11 to joint 19 may be in any suitable Wayas, for instance, by a union 21 thereby permitting ready disconnection thereat should such become necessary. By

the useofsuc-h meansany of the parts may 1 be readily inspected, repaired, .orreplaced without'interferingin the leastyvith the boilerpressure. Alocomotive engineer,forinstance, does nothave to sulfer his engine to become cold, but may readily attend to any slight disturbances by simply removing plug 17 after having turned casing 13 to close nipple 12. Should. any more extensive repairs or renewal of parts, like the seat, become necessaryf'tlie locomotive without having to be ""killed can be run into a roundhouse and become available again in a very short time, saving the loss" ofi'st'eam', loss of time, and waste of fuel, which the firing up wouldotherwise entail.

Marks indicating the position of the casing in which it shuts 'oli the' steam completely may be provided on the outside to prevent scalding by escaping. steam due to a premature separation of the parts. 'It ispreferably done, however, in the manner showuby us, which consists of providing one or'more openings one set, 22, in the casingnear'the top edge thereof and the other, 23, inthewall of plug 17, but so located as to be below 31c n unscrewing thislatter if the steam is not completely shut off part of it willescape through these holes as soon" as they" meet (see Fig. 3) and indicate by itshissing sound the condition of :the'partsbefore any damage or injury canresult. t r

The details of construction for the purpose of connecting the partsmay be varied more or less- As shown in Fig.1, casing-13, forming the stop-key,'is held'in positiomwithin therein operating automatically to prevent passage from the latter to the former,'an independent stop operating positively for the purpose of preventing such passage, a plug 17 removably attached to'the valve-housing by means of a screwc'onnection and perfora tions in each adapted to registerafter'the plug is partly disconnected.

2. A fitting for the purpose described, consisting substantially of a cylindricalhousing open at'both' ends 'and having a laterally extending open nipple, a cylindrical casing also end extending into the casing and forming open at both ends, .rotatably fitted thereinto the seat for the check-valve thereat. from one end and having a port adapted to In testimony whereof we hereunto set our register with 1311116 open nipple, means to hold hands in the presence of two witnesses.

5 this casing wit in the housing, a plug 17 and a ferrule 19 both removably secured and closing the open ends of the housing, and a JAMES BROWfi cheek-Valve contained between the two be- Witnesses 2 O. SPENGEL, ARTHUR KLINE.

coming thereby accessible from either end I0 according to whether the plug or the ferrule is removed, this latter having also its inner 

